sql-server - SQL Server 2008 根据 1 个唯一列查找行并在第二列中查找重复项

Question

能否建议我如何编写查询来检索以下内容？

我需要找到 A 中的值重复但 B 中的值不同的任何行

  A    B 
4567    2 
852125  9
444     8
2547    25
255     4
256     1
2547    25
2547    27
259     4
2547    25

应该返回

2547    27 
2547    25 

因为 2547 在 B 列中有两个不相同的值

感谢期待

P

Answer 1

with cte1 as (
    select distinct A, B from Table1
), cte2 as (
    select A, B, count(*) over(partition by A) as cnt from cte1
)
select
    A, B
from cte2 
where cnt > 1

sql fiddle demo

或

with cte as (
    select distinct
        A, B, min(B) over(partition by A) as m1, max(B) over(partition by A) as m2
    from Table1
)
select
    A, B
from cte
where m1 <> m2

sql fiddle demo